table {
    width: 100%;
}
td {
    text-align: center;
}
th {
    background-color: #cccccc;
}
tr:nth-child(even) {
    background-color: #f2f2f2;
}
tr:hover {
    background-color: #dddddd;
}
a {
    text-decoration: none;
    color: #0000ff;
}
a:hover {
    color: #ff0000;
}
form {
    display: inline;
}
#deleteBook {
    padding: 5px 10px;
    border: none;
    background-color: #4CAF50;
    color: white;
    cursor: pointer;
}

input[type="text"] {
    width: 200px;
    height: 30px;
    margin: 5px;
}
#searchBook {
    width: 80px;
    height: 30px;
    border: none;
    background-color: #4CAF50;
    color: white;
}
.headImg {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background-color: #f5f5f5;
    display: inline-block;
    vertical-align: middle;
    margin-right: 10px;
    cursor: pointer;
}
.bookImg{
    width: 50px;
    height: 50px;
    background-color: #f5f5f5;
    display: inline-block;
    vertical-align: middle;
    margin-right: 10px;
    cursor: pointer;
}
